Arithmetic 40431

Fill the numbers in the place of the asterisk to form an arithmetic sequence.
(2, *, 5, *, 8, 9.5,11)

Correct answer:

a2 =  3.5
a4 =  6.5

Step-by-step explanation:

a1=2 a3=5 a5=8 a6=9.5 a7=11  d1=a7a6=119.5=23=121=1.5 d2=a6a5=9.58=23=121=1.5 d1=d2  a2=a1+d1=2+1.5=3.5
a4=a3+d1=5+1.5=213=621=6.5   Verifying Solution:  b5=a4+d1=6.5+1.5=8 b5=a5



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